Problem

Problem #79 
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool { ...
XCTAssertTrue(correctBracketing(brackets: "()") == true)
XCTAssertTrue(correctBracketing(brackets: "(()())") == true)
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true)
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true)
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false)
XCTAssertTrue(correctBracketing(brackets: ")(()") == false)
XCTAssertTrue(correctBracketing(brackets: "(") == false)
XCTAssertTrue(correctBracketing(brackets: "((((") == false)
XCTAssertTrue(correctBracketing(brackets: ")") == false)
XCTAssertTrue(correctBracketing(brackets: "(()") == false)
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false)
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false)
  • 0.83 Compiled
  • 0.82 Passed

Solutions

Problem #79 Experiment #27 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>
Problem #79 Experiment #28 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused
Problem #79 Experiment #29 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            guard stack.count > 0 else { return false }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            guard stack.count > 0 else { return false }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #30 

func correctBracketing(brackets: String) -> Bool {
    // TODO: implement this function
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // TODO: implement this function
}
```
} // missing return in global function expected to return 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    // TODO: implement this function
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // TODO: implement this function
}
```
} // missing return in global function expected to return 'Bool'
Problem #79 Experiment #31 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```
} // missing return in global function expected to return 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #32 

func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
let stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for character in brackets {
        switch character {
        case "(":
            stack.push(character)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for character in brackets {
        switch character {
        case "(":
            stack.push(character)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
let stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    let stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
stack.append(char) // cannot use mutating member on immutable value: 'stack' is a 'let' constant
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
stack.removeLast() // cannot use mutating member on immutable value: 'stack' is a 'let' constant

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'

func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
let stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for character in brackets {
        switch character {
        case "(":
            stack.push(character)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = Stack<Character>()
    
    for character in brackets {
        switch character {
        case "(":
            stack.push(character)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
let stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for character in brackets {
        switch character {
        case "(":
            stack.append(character)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for character in brackets {
        switch character {
        case "(":
            stack.append(character)
        case ")":
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
Problem #79 Experiment #38 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #39 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()
    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()

    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }

    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = Stack<Character>()

    for char in brackets {
        switch char {
        case "(":
            stack.push(char)
        case ")":
            if stack.isEmpty || stack.pop()!= "(" {
                return false
            }
        default:
            return false
        }
    }

    return stack.isEmpty
}
```
var stack = Stack<Character>() // cannot find 'Stack' in scope
if stack.isEmpty || stack.pop()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.pop()!= "(" { // use of '=' in a boolean context, did you mean '=='?
Problem #79 Experiment #40 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #41 

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
    
    
    
    
    var stack = [Double
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
    
    
    
    var stack = [Double
    
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
    
    
    
    
    
    var stack = [Double
    var stack =
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
    
    
    
    
    var stack = [Double]
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
    
    
    
    var stack = [Double
    
    var stack = [Double]()
    
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}
```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 brackets is a string of "(" and ")".
 return true if every opening bracket has a corresponding closing bracket.
 correctBracketing(brackets: "(") == false
 correctBracketing(brackets: "()") == true
 correctBracketing(brackets: "(()())") == true
 correctBracketing(brackets: ")(()") == false
 */
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope
Problem #79 Experiment #42 

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
let openingBrackets = "("("\(String" +
func correct
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {

XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {

XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {

XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
let openingBrackets = "("("(brackets: String {
    
    var openingBracketCount = 0
    var openingBracket
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
let openingBrackets = "("("
func correctBrackets: String {
    var opening = 0
    var openingBrackets
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
let openingBrackets = brackets = brackets.filter {
    return brackets.
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
let stack = Stack<String>()
for char in
    let openBracket in
    if brackets.unicode in
    let range = brackets.unicode = "("("("("("(" + "(") {

XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope
Problem #79 Experiment #43 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            let lastOpenBracket = stack.popLast()
            if lastOpenBracket != "(" {
                return false
            }
        default:
            continue
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            let lastOpenBracket = stack.popLast()
            if lastOpenBracket != "(" {
                return false
            }
        default:
            continue
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            if let lastOpenBracket = stack.popLast() {
                if lastOpenBracket != "(" {
                    return false
                }
            } else {
                return false
            }
        default:
            continue
        }
    }
    
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            if let lastOpenBracket = stack.popLast() {
                if lastOpenBracket != "(" {
                    return false
                }
            } else {
                return false
            }
        default:
            continue
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            if stack.last != "(" {
                return false
            }
            stack.removeLast()
        default:
            continue
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            if stack.last != "(" {
                return false
            }
            stack.removeLast()
        default:
            continue
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.popLast()
            }
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused
Problem #79 Experiment #46 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused
Problem #79 Experiment #47 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #48 

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
import Foundation

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```
Problem #79 Experiment #51 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #52 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
            if counter < 0 {
                return false
            }
        }
    }
    return counter == 0
}
```
Problem #79 Experiment #77 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```

stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```

stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```

stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```

stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```

stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #78 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets.characters {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets.characters {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
for character in brackets.characters { // 'characters' is unavailable: Please use String directly

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```
Problem #79 Experiment #79 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
Problem #79 Experiment #87 

func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Ex
stack.append(char) // cannot convert value of type 'Character' to expected argument type 'String'

func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Ex
stack.append(char) // cannot convert value of type 'Character' to expected argument type 'String'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Problem

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Problem

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
```
### Problem

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
```
### Problem

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
```
### Problem

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Ex

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Ex

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        default:
            break
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #88 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Link

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Test

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
### Link

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Link

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Link

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #101 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```


func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```


func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```


func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```
Problem #79 Experiment #104 

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

// Example usage:
print(correctBracketing(brackets: "("))       // Output: false
print(correctBracketing(brackets: "()"))      // Output: true
print(correctBracketing(brackets: "(()())"))  // Output: true
print(correctBracketing(brackets: ")(()"))    // Output: false
```

This function uses a stack to keep track of the opening brackets. For each opening bracket encountered, it pushes it onto the stack. For each closing bracket encountered, it checks if the stack is NOT empty and pops the last element from the stack. If the stack is empty after processing all characters, it means all brackets are balanced and the function returns true. Otherwise, it returns false.

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

// Example usage:
print(correctBracketing(brackets: "("))       // Output: false
print(correctBracketing(brackets: "()"))      // Output: true
print(correctBracketing(brackets: "(()())"))  // Output: true
print(correctBracketing(brackets: ")(()"))    // Output: false
```

This function uses a stack to keep track of the opening brackets. When a closing bracket is encountered, it checks if there is a corresponding opening bracket by popping from the stack. If the stack is empty or there are remaining opening brackets after processing the entire string, it means the brackets are not balanced.

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #107 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      }
      stack.removeLast()
    }
  }
  return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>```
Problem #79 Experiment #113 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
<|file_separator|>
Problem #79 Experiment #114 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            _ = stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            _ = stack.popLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #115 

func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.pop()
        default:
            return false
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.pop()
        default:
            return false
        }
    }
    return stack.isEmpty
}
```
stack.append(bracket) // cannot convert value of type 'Character' to expected argument type 'String'
stack.pop() // value of type '[String]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        let bracket = brackets[i]
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        let bracket = brackets[i]
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}

// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correct
let bracket = brackets[i] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
stack.append(bracket) // cannot convert value of type 'Character' to expected argument type 'String'
stack.pop() // value of type '[String]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack: Array<Char> = []
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: Array<Char> = []
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty
}
```
var stack: Array<Char> = [] // cannot find type 'Char' in scope
if c == '(' { // single-quoted string literal found, use '"'

func correctBracketing(brackets: String) -> Bool {
    var stack: Array<Char> = []
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else if c == ')' {
            if stack.count == 0 {
                return false
            } else {
                stack.pop()
            }
        } else {
            return false
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: Array<Char> = []
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else if c == ')' {
            if stack.count == 0 {
                return false
            } else {
                stack.pop()
            }
        } else {
            return false
        }
    }
    return stack.count == 0
}
```
var stack: Array<Char> = [] // cannot find type 'Char' in scope
if c == '(' { // single-quoted string literal found, use '"'
} else if c == ')' { // single-quoted string literal found, use '"'

func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else if c == ')' {
            if stack.isEmpty {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else if c == ')' {
            if stack.isEmpty {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty
}
<|file_separator|>
if c == '(' { // single-quoted string literal found, use '"'
stack.append(c) // cannot convert value of type 'Character' to expected argument type 'String'
} else if c == ')' { // single-quoted string literal found, use '"'
stack.pop() // value of type '[String]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        if brackets[i] == '(' {
            stack.append(brackets[i])
        } else {
            if let last = stack.last {
                if last == '(' {
                    stack.removeLast()
                } else {
                    return false
                }
            } else {
                return false
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        if brackets[i] == '(' {
            stack.append(brackets[i])
        } else {
            if let last = stack.last {
                if last == '(' {
                    stack.removeLast()
                } else {
                    return false
                }
            } else {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if brackets[i] == '(' { // single-quoted string literal found, use '"'
if brackets[i] == '(' { // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
stack.append(brackets[i]) // cannot convert value of type 'Character' to expected argument type 'String'
if last == '(' { // single-quoted string literal found, use '"'

func correctBracketing(brackets: String) -> Bool {
    var stack = Array<Char>()
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = Array<Char>()
    for c in brackets {
        if c == '(' {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}
```
var stack = Array<Char>() // cannot find type 'Char' in scope
if c == '(' { // single-quoted string literal found, use '"'

func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        if brackets[i] == '(' {
            stack.append(brackets[i])
        } else {
            if let top = stack.last {
                if top == '(' {
                    stack.popLast()
                } else {
                    return false
                }
            } else {
                return false
            }
        }
    }
    return stack.isEmpty
}

func longestPalindrome(s: String) -> String {
    var longest: String = ""
    var longestLength: Int = 0
    for i in 0..<s.count {
        for j in i..<s.count {
            var substring: String = s[i..<j+1]
            if substring == substring.reversed {
                if substring.count > longestLength {
                    longest = substring
                    longestLength = substring.count
                }
            }
        }
    }
    return longest
}

func firstNonRepeatingCharacter(s: String) -> String {
    var counts: [String: Int] = [String: 0]
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            counts[char] = count + 1
        } else {
            counts[char] = 1
        }
    }
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            if count == 1 {
                return char
            }
        }
    }
    return ""
}

func firstRepeatingCharacter(s: String) -> String {
    var counts: [String: Int] = [String: 0]
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            counts[char] = count + 1
        } else {
            counts[char] = 1
        }
    }
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            if count > 1 {
                return char
            }
        }
    }
    return ""
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [String] = []
    for i in 0..<brackets.count {
        if brackets[i] == '(' {
            stack.append(brackets[i])
        } else {
            if let top = stack.last {
                if top == '(' {
                    stack.popLast()
                } else {
                    return false
                }
            } else {
                return false
            }
        }
    }
    return stack.isEmpty
}

// return the longest substring of s that is a palindrome.
// longestPalindrome("babad") == "bab"
// longestPalindrome("cbbd") == "bb"
// longestPalindrome("a") == "a"
// longestPalindrome("abc") == "a"
// longestPalindrome("aba") == "aba"
// longestPalindrome("abac") == "aba"
// longestPalindrome("abacab") == "aba"
// longestPalindrome("abacaba") == "abacaba"
// longestPalindrome("abacaba") == "abacaba"
func longestPalindrome(s: String) -> String {
    var longest: String = ""
    var longestLength: Int = 0
    for i in 0..<s.count {
        for j in i..<s.count {
            var substring: String = s[i..<j+1]
            if substring == substring.reversed {
                if substring.count > longestLength {
                    longest = substring
                    longestLength = substring.count
                }
            }
        }
    }
    return longest
}

// return the first non-repeating character in s.
// firstNonRepeatingCharacter("abcabc") == "d"
// firstNonRepeatingCharacter("abcde") == "a"
// firstNonRepeatingCharacter("aabbcc") == "d"
// firstNonRepeatingCharacter("aabbccdd") == "e"
// firstNonRepeatingCharacter("aabbccdde") == "f"
func firstNonRepeatingCharacter(s: String) -> String {
    var counts: [String: Int] = [String: 0]
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            counts[char] = count + 1
        } else {
            counts[char] = 1
        }
    }
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            if count == 1 {
                return char
            }
        }
    }
    return ""
}

// return the first repeating character in s.
// firstRepeatingCharacter("abcabc") == "b"
// firstRepeatingCharacter("abcde") == ""
// firstRepeatingCharacter("aabbcc") == "a"
// firstRepeatingCharacter("aabbccdd") == "b"
// firstRepeatingCharacter("aabbccdde") == "c"
func firstRepeatingCharacter(s: String) -> String {
    var counts: [String: Int] = [String: 0]
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            counts[char] = count + 1
        } else {
            counts[char] = 1
        }
    }
    for i in 0..<s.count {
        var char: String = s[i]
        if let count = counts[char] {
            if count > 1 {
                return char
            }
        }
    }
    return ""
}

// return the first character that appears in both s1 and s2.
// firstCommonCharacter("abca", "cdef") == ""
// firstCommonCharacter("abca", "abcf") == "a"
// firstCommonCharacter("abca", "abca") == "a"
// firstCommonCharacter("abca", "abca") == "a"
// firstCommonCharacter("abca", "abca") == "a"
func firstCommonCharacter(s1: String, s2: String) -> String {
    var counts: [String: Int] = [String: 0]
    for i in 0..<s1.count {
        var char: String = s1[i]
        if let count = counts[char] {
            counts[char] = count + 1
        } else {
            counts[char] = 1
        }
if brackets[i] == '(' { // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
if brackets[i] == '(' { // single-quoted string literal found, use '"'
stack.append(brackets[i]) // cannot convert value of type 'Character' to expected argument type 'String'
if top == '(' { // single-quoted string literal found, use '"'
stack.popLast() // result of call to 'popLast()' is unused
var substring: String = s[i..<j+1] // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.
if substring == substring.reversed { // type '() -> [String.Element]' (aka '() -> Array<Character>') cannot conform to 'StringProtocol'
var counts: [String: Int] = [String: 0] // cannot convert value of type 'String.Type' to expected dictionary key type 'String'
var char: String = s[i] // cannot convert value of type 'Character' to specified type 'String'
var char: String = s[i] // cannot convert value of type 'Character' to specified type 'String'
var counts: [String: Int] = [String: 0] // cannot convert value of type 'String.Type' to expected dictionary key type 'String'
var char: String = s[i] // cannot convert value of type 'Character' to specified type 'String'
var char: String = s[i] // cannot convert value of type 'Character' to specified type 'String'

func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}

// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: "(()())") == true
stack.append(c) // cannot convert value of type 'Character' to expected argument type 'String'
stack.pop() // value of type '[String]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = Array<Char>()
    for i in 0..<brackets.count {
        var bracket = brackets[i]
        if bracket == '(' {
            stack.append(bracket)
        } else if bracket == ')' {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = Array<Char>()
    for i in 0..<brackets.count {
        var bracket = brackets[i]
        if bracket == '(' {
            stack.append(bracket)
        } else if bracket == ')' {
            if stack.count == 0 {
                return false
            }
            stack.pop()
        }
    }
    return stack.count == 0
}

// test the function
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "()()")) // true
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()()(")) // false
print(correctBracketing(brackets: "()
var stack = Array<Char>() // cannot find type 'Char' in scope
var bracket = brackets[i] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
if bracket == '(' { // single-quoted string literal found, use '"'
} else if bracket == ')' { // single-quoted string literal found, use '"'
Problem #79 Experiment #116 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #117 

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []

    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<end_of_turn>
<start_of_turn>model
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```
Problem #79 Experiment #118 

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
            if openingBrackets < 0 {
                return false
            }
        }
    }
    return openingBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var openingBrackets = 0
    for char in brackets {
        if char == "(" {
            openingBrackets += 1
        } else if char == ")" {
            openingBrackets -= 1
        }
        if openingBrackets < 0 {
            return false
        }
    }
    return openingBrackets == 0
}
```
Problem #79 Experiment #119 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #120 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
[INST] Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false [/INST] ```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #121 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.last!= "(" {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.last!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.last!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.last!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'
if stack.isEmpty || stack.last!= "(" { // use of '=' in a boolean context, did you mean '=='?
Problem #79 Experiment #122 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty || stack.removeLast()!= "(" {
                return false
            }
        }
    }
    
    return stack.isEmpty
}
```
if stack.isEmpty || stack.removeLast()!= "(" { // expression is not assignable: '||' returns immutable value
if stack.isEmpty || stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.isEmpty || stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.isEmpty || stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.isEmpty || stack.removeLast()!= "(" { // cannot convert value of type 'Character' to expected argument type 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #123 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }

    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused
Problem #79 Experiment #124 

func correctBracketing(brackets: String) -> Bool {
    let stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    let stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
stack.append(char) // cannot use mutating member on immutable value: 'stack' is a 'let' constant
stack.removeLast() // cannot use mutating member on immutable value: 'stack' is a 'let' constant

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            let lastBracket = stack.popLast()
            if lastBracket != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            let lastBracket = stack.popLast()
            if lastBracket != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    let array = Array(brackets)
    var count = 0
    for bracket in array {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            } else {
                count -= 1
            }
        }
    }
    return count == 0
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    let array = Array(brackets)
    var count = 0
    for bracket in array {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            } else {
                count -= 1
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #125 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #126 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #127 

func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```
} // missing return in global function expected to return 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // your code here
}
```
} // missing return in global function expected to return 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #128 

func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for c in brackets.characters {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
    for c in brackets.characters {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
for c in brackets.characters { // 'characters' is unavailable: Please use String directly

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets.characters {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets.characters {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
for c in brackets.characters { // 'characters' is unavailable: Please use String directly

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #129 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false<|im_end|>
<|im_start|>assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
Problem #79 Experiment #130 

func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return false
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return false
}
```
 // XCTAssertTrue failed

func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return false
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return false
}

correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
```
 // XCTAssertTrue failed

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return true
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    // TODO: Implement this function to pass the tests
    return true
}
```
 // XCTAssertTrue failed

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

// Example usage:
print(correctBracketing(brackets: "("))       // Output: false
print(correctBracketing(brackets: "()"))      // Output: true
print(correctBracketing(brackets: "(()())"))  // Output: true
print(correctBracketing(brackets: ")(()"))    // Output: false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

// Test cases
assert(correctBracketing(brackets: "(") == false)
assert(correctBracketing(brackets: "()") == true)
assert(correctBracketing(brackets: "(()())") == true)
assert(correctBracketing(brackets: ")(()") == false)
print("All test cases passed.")
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #131 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for bracket in brackets {
        if bracket == "(" {
            counter += 1
        } else if bracket == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for bracket in brackets {
        if bracket == "(" {
            counter += 1
        } else if bracket == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```
Problem #79 Experiment #132 

func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var openCount = 0
    var closeCount = 0
    for bracket in brackets {
        if bracket == "(" {
            openCount += 1
        } else if bracket == ")" {
            closeCount += 1
        }
    }
    return openCount == closeCount
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var openCount = 0
    var closeCount = 0
    for bracket in brackets {
        if bracket == "(" {
            openCount += 1
        } else if bracket == ")" {
            closeCount += 1
        }
    }
    return openCount == closeCount
}
```
 // XCTAssertTrue failed

func correctBracketing(brackets: String) -> Bool { 
    var openCount = 0
    var closeCount = 0
    for char in brackets {
        if char == "(" {
            openCount += 1
        } else if char == ")" {
            closeCount += 1
        }
    }
    return openCount == closeCount
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var openCount = 0
    var closeCount = 0
    for char in brackets {
        if char == "(" {
            openCount += 1
        } else if char == ")" {
            closeCount += 1
        }
    }
    return openCount == closeCount
}
```
 // XCTAssertTrue failed

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #133 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }

    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            return false
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        switch char {
        case "(":
            stack.append(char)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #134 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
Question:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false

Answer:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #135 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.popLast()
        }
    }
    return stack.isEmpty
}
```
stack.popLast() // result of call to 'popLast()' is unused
Problem #79 Experiment #136 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
[INST]  Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false[/INST]  ```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
            if count < 0 {
                return false
            }
        }
    }
    return count == 0
}
```
Problem #79 Experiment #137 

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for bracket in brackets {
        if bracket == "(" {
            counter += 1
        } else if bracket == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for bracket in brackets {
        if bracket == "(" {
            counter += 1
        } else if bracket == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
system
You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var counter = 0
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        if counter < 0 {
            return false
        }
    }
    return counter == 0
}
```
Problem #79 Experiment #138 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
        }
        if openBrackets < 0 {
            return false
        }
    }
    return openBrackets == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
        }
        if openBrackets < 0 {
            return false
        }
    }
    return openBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #139 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}


func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Here is the Swift code for the function:

```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
Problem #79 Experiment #140 

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        if balance < 0 {
            return false
        }
    }
    return balance == 0
}
```
Problem #79 Experiment #141 

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have matching closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have matching closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0

    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }

        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }

    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0

    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }

        // If balance goes negative, there are more closing brackets than opening ones
        if balance < 0 {
            return false
        }
    }

    // If balance is zero, all opening brackets have corresponding closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // All opening brackets should have matching closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // All opening brackets should have matching closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // All opening brackets should have matching closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // All opening brackets should have matching closing brackets
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have matching closing brackets
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without a matching opening bracket
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all opening brackets have matching closing brackets
    return balance == 0
}
```
Problem #79 Experiment #142 

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```swift
func correctBracketing(brackets: String) -> Bool {
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        if balance < 0 {
            return false
        }
    }
    
    return balance == 0
}
```
Problem #79 Experiment #143 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
Problem #79 Experiment #144 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else if stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else if stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for char in brackets {
    if char == "(" {
      stack.append(char)
    } else if char == ")" {
      if stack.isEmpty {
        return false
      } else {
        stack.removeLast()
      }
    }
  }
  return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for char in brackets {
    if char == "(" {
      stack.append(char)
    } else if char == ")" {
      if stack.isEmpty {
        return false
      } else {
        stack.removeLast()
      }
    }
  }
  return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      } else {
        stack.removeLast()
      }
    }
  }
  return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
  var stack = [Character]()
  for bracket in brackets {
    if bracket == "(" {
      stack.append(bracket)
    } else if bracket == ")" {
      if stack.isEmpty {
        return false
      } else {
        stack.removeLast()
      }
    }
  }
  return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else if stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        default:
            continue
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else if stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        default:
            continue
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else if c == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        default:
            break
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #146 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #150 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty || stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty || stack.last != "(" {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #151 

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [String]()

XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope
Problem #79 Experiment #153 

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for br
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for br
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for br
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack: [Character] = []
   
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope
Problem #79 Experiment #155 

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character
XCTAssertTrue(correctBracketing(brackets: "()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()())") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()((()()())())(()()(()))") == true) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((()())))") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "((((") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: ")") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())())(()") == false) // cannot find 'correctBracketing' in scope
XCTAssertTrue(correctBracketing(brackets: "()()(()())()))()") == false) // cannot find 'correctBracketing' in scope
Problem #79 Experiment #157 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #160 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
`````````swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
``````
```python
# brackets is a string of "(" and ")".
# return true if every opening bracket has a corresponding closing bracket.
# correctBracketing(brackets: "(") == False
# correctBracketing(brackets: "()") == True
# correctBracketing(brackets: "(()())") == True
# correctBracketing(brackets: ")(()") == False
def correctBracketing(brackets):
    stack = []

    for bracket in brackets:
        if bracket == "(":
            stack.append(bracket)
        elif bracket == ")":
            if not stack:
                return False
            else:
                stack.pop()

    return not stack
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
``````
```python
# brackets is a string of "(" and ")".
# return true if every opening bracket has a corresponding closing bracket.
# correctBracketing("(") == False
# correctBracketing("()") == True
# correctBracketing("(()())") == True
# correctBracketing(")(()") == False
def correctBracketing(brackets):
    stack = []

    for bracket in brackets:
        if bracket == "(":
            stack.append(bracket)
        elif bracket == ")":
            if not stack:
                return False
            else:
                stack.pop()

    return not stack
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()

    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }

    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
`````````swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #162 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for c in brackets {
        if c == "(" {
            stack.append(c)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
Problem #79 Experiment #164 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func addBrackets(brackets: String) -> String {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return "NOT VALID"
            }
            stack.removeLast()
        }
    }
    var newString = String()
    for char in brackets {
        if char == "(" {
            newString.append(")")
        } else {
            newString.append(char)
        }
    }
    for char in stack {
        newString.append(")")
    }
    return newString
}

func validBrackets(brackets: String) -> [String] {
    var stack = [Character]()
    var validStrings = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
        }
    }
    for char in stack {
        validStrings.append(addBrackets(brackets: brackets))
    }
    return validStrings
}

func validBracketsCount(brackets: String) -> Int {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return 0
            }
            stack.removeLast()
        }
    }
    return stack.count + 1
}

func validBracketsCountRecursive(brackets: String) -> Int {
    if correctBracketing(brackets: brackets) {
        return 1
    }
    var count = 0
    for validString in validBrackets(brackets: brackets) {
        count += validBracketsCountRecursive(brackets: validString)
    }
    return count
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return a string with each open bracket replaced with a close bracket.
// if the string is not bracketed correctly, return the string "NOT VALID".
// addBrackets(brackets: "(") == ")"
// addBrackets(brackets: "()") == "())"
// addBrackets(brackets: "()(())") == "()()()"
// addBrackets(brackets: ")(()") == "NOT VALID"
func addBrackets(brackets: String) -> String {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return "NOT VALID"
            }
            stack.removeLast()
        }
    }
    var newString = String()
    for char in brackets {
        if char == "(" {
            newString.append(")")
        } else {
            newString.append(char)
        }
    }
    for char in stack {
        newString.append(")")
    }
    return newString
}

// brackets is a string of "(" and ")".
// return an array of all the possible strings of brackets that can be added to the end of brackets
// to balance it.
// validBrackets(brackets: "(") == ["(())"]
// validBrackets(brackets: "()") == ["(())", "()()"]
// validBrackets(brackets: "()(())") == ["(())", "()()()", "(())()", "()(())", "()()()"]
// validBrackets(brackets: ")(())") == []
func validBrackets(brackets: String) -> [String] {
    var stack = [Character]()
    var validStrings = [String]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
        }
    }
    for char in stack {
        validStrings.append(addBrackets(brackets: brackets))
    }
    return validStrings
}

// brackets is a string of "(" and ")".
// return the number of possible strings of brackets that can be added to the end of brackets
// to balance it.
// validBracketsCount(brackets: "(") == 5
// validBracketsCount(brackets: "()") == 5
// validBracketsCount(brackets: "()(())") == 1
// validBracketsCount(brackets: ")(())") == 0
func validBracketsCount(brackets: String) -> Int {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return 0
            }
            stack.removeLast()
        }
    }
    return stack.count + 1
}

// brackets is a string of "(" and ")".
// return the number of valid strings of brackets that can be created from brackets.
// validBracketsCountRecursive(brackets: "(") == 5
// validBracketsCountRecursive(brackets: "()") == 5
// validBracketsCountRecursive(brackets: "()(())") == 1
// validBracketsCountRecursive(brackets: ")(())") == 0
func validBracketsCountRecursive(brackets: String) -> Int {
    if correctBracketing(brackets: brackets) {
        return 1
    }
    var count = 0
    for validString in validBrackets(brackets: brackets) {
        count += validBracketsCountRecursive(brackets: validString)
    }
    return count
}

// brackets is a string of "(" and ")".
// return the number of valid strings of brackets that can be created from brackets.
// validBracketsCountDynamic(brackets: "(") == 5
// validBracketsCountDynamic(brackets: "()") == 5
// validBracketsCountDynamic(
for char in stack { // immutable value 'char' was never used; consider replacing with '_' or removing it
for char in stack { // immutable value 'char' was never used; consider replacing with '_' or removing it

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

//: [Next](@next)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.count == 0 {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.count == 0
}

// Test cases
assert(correctBracketing(brackets: "")) // true
assert(correctBracketing(brackets: "(")) // false
assert(correctBracketing(brackets: "()")) // true
assert(correctBracketing(brackets: "(()())")) // true
assert(correctBracketing(brackets: ")(()")) // false
assert(correctBracketing(brackets: ")(()(")) // false
assert(correctBracketing(brackets: ")(()()")) // false
assert(correctBracketing(brackets: ")(()()(")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing(brackets: ")(()(((((")) // false
assert(correctBracketing

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func unmatchedClosingBrackets(brackets: String) -> Int {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return 1
            }
            stack.removeLast()
        }
    }
    return stack.count
}

func unmatchedOpeningBrackets(brackets: String) -> Int {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return 1
            }
            stack.removeLast()
        }
    }
    return stack.count
}

func balancedBrackets(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func unbalancedBrackets(brackets: String) -> Int {
    var stack = [Character]()
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                count += 1
            } else {
                stack.removeLast()
            }
        }
    }
    return count + stack.count
}

func unbalancedBrackets2(brackets: String) -> Int {
    var stack = [Character]()
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                count += 1
            } else {
                stack.removeLast()
            }
        }
    }
    return count + stack.count
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return the number of ")" that don't have a corresponding "(".
// unmatchedClosingBrackets(brackets: "(") == 1
// unmatchedClosingBrackets(brackets: "()") == 0
// unmatchedClosingBrackets(brackets: "(()())") == 0
// unmatchedClosingBrackets(brackets: ")(()") == 2
func unmatchedClosingBrackets(brackets: String) -> Int {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return 1
            }
            stack.removeLast()
        }
    }
    return stack.count
}

// brackets is a string of "(" and ")".
// return the number of "(" that don't have a corresponding ")"
// unmatchedOpeningBrackets(brackets: "(") == 0
// unmatchedOpeningBrackets(brackets: "()") == 0
// unmatchedOpeningBrackets(brackets: "(()())") == 0
// unmatchedOpeningBrackets(brackets: ")(()") == 1
func unmatchedOpeningBrackets(brackets: String) -> Int {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return 1
            }
            stack.removeLast()
        }
    }
    return stack.count
}

// brackets is a string of "(" and ")".
// return true if there are the same number of "(" and ")".
// balancedBrackets(brackets: "(") == false
// balancedBrackets(brackets: "()") == true
// balancedBrackets(brackets: "(()())") == true
// balancedBrackets(brackets: ")(()") == false
func balancedBrackets(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return the number of "(" and ")" that don't have a corresponding "(" or ")".
// unbalancedBrackets(brackets: "(") == 1
// unbalancedBrackets(brackets: "()") == 0
// unbalancedBrackets(brackets: "(()())") == 0
// unbalancedBrackets(brackets: ")(()") == 2
func unbalancedBrackets(brackets: String) -> Int {
    var stack = [Character]()
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                count += 1
            } else {
                stack.removeLast()
            }
        }
    }
    return count + stack.count
}

// brackets is a string of "(" and ")".
// return the number of "(" and ")" that don't have a corresponding "(" or ")".
// unbalancedBrackets(brackets: "(") == 1
// unbalancedBrackets(brackets: "()") == 0
// unbalancedBrackets(brackets: "(()())") == 0
// unbalancedBrackets(brackets: ")(()") == 2
func unbalancedBrackets2(brackets: String) -> Int {
    var stack = [Character]()
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                count += 1
            } else {
                stack.removeLast()
            }
        }
    }
    return count + stack.count
}

//

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

//: [Next](@next)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// Test cases
assert(correctBracketing(brackets: "")) // true
assert(correctBracketing(brackets: "(")) // false
assert(correctBracketing(brackets: "()")) // true
assert(correctBracketing(brackets: "(()())")) // true
assert(correctBracketing(brackets: ")(()")) // false
assert(correctBracketing(brackets: ")(()(")) // false
assert(correctBracketing(brackets: ")(()()")) // false
assert(correctBracketing(brackets: ")(()()(")) // false
assert(correctBracketing(brackets: ")(()()()(")) // false
assert(correctBracketing(brackets: ")(()()()(((()))(")) // false
assert(correctBracketing(brackets: ")(()()()(((()))()(")) // false
assert(correctBracketing(brackets: ")(()()()(((()))()(()))(")) // false
assert(correctBracketing(brackets: ")(()()()(((()))()(()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()


//: [Next](@next)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func mismatchedBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else {
            if stack.count == 0 {
                return [index]
            }
            stack.removeLast()
        }
    }
    return stack
}

func correctedBrackets(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}

func correctedBrackets2(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}

func correctedBrackets3(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return the number of indices where the brackets are mismatched.
// mismatchedBrackets(brackets: "(") == [0]
// mismatchedBrackets(brackets: "()") == []
// mismatchedBrackets(brackets: "(()())") == []
// mismatchedBrackets(brackets: ")(()") == [0, 1, 2, 3]
func mismatchedBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else {
            if stack.count == 0 {
                return [index]
            }
            stack.removeLast()
        }
    }
    return stack
}

// brackets is a string of "(" and ")".
// return a string containing the brackets in the correct order.
// correctedBrackets(brackets: "(") == "()"
// correctedBrackets(brackets: "()") == "()"
// correctedBrackets(brackets: "(()())") == "()()"
// correctedBrackets(brackets: ")(()") == "()()"
func correctedBrackets(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}

// brackets is a string of "(" and ")".
// return a string containing the brackets in the correct order.
// correctedBrackets(brackets: "(") == "()"
// correctedBrackets(brackets: "()") == "()"
// correctedBrackets(brackets: "(()())") == "()()"
// correctedBrackets(brackets: ")(()") == "()()"
func correctedBrackets2(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}

// brackets is a string of "(" and ")".
// return a string containing the brackets in the correct order.
// correctedBrackets(brackets: "(") == "()"
// correctedBrackets(brackets: "()") == "()"
// correctedBrackets(brackets: "(()())") == "()()"
// correctedBrackets(brackets: ")(()") == "()()"
func correctedBrackets3(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
                stack.removeLast()
            }
        }
    }
    result += String(stack.reversed())
    return result
}

// brackets is a string of "(" and ")".
// return a string containing the brackets in the correct order.
// correctedBrackets(brackets: "(") == "()"
// correctedBrackets(brackets: "()") == "()"
// correctedBrackets(brackets: "(()())") == "()()"
// correctedBrackets(brackets: ")(()") == "()()"
func correctedBrackets4(brackets: String) -> String {
    var stack = [Character]()
    var result = ""
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.count == 0 {
                result += ")"
            } else {
               

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// Test cases
assert(correctBracketing(brackets: "")) // true
assert(correctBracketing(brackets: "(")) // false
assert(correctBracketing(brackets: "()")) // true
assert(correctBracketing(brackets: "(()())")) // true
assert(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func correctBracketing2(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

func correctBracketing3(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

func correctBracketing4(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

func correctBracketing5(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func correctBracketing6(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing2(brackets: "(") == false
// correctBracketing2(brackets: "()") == true
// correctBracketing2(brackets: "(()())") == true
// correctBracketing2(brackets: ")(()") == false
func correctBracketing2(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing3(brackets: "(") == false
// correctBracketing3(brackets: "()") == true
// correctBracketing3(brackets: "(()())") == true
// correctBracketing3(brackets: ")(()") == false
func correctBracketing3(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing4(brackets: "(") == false
// correctBracketing4(brackets: "()") == true
// correctBracketing4(brackets: "(()())") == true
// correctBracketing4(brackets: ")(()") == false
func correctBracketing4(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            if stack.removeLast()!= "(" {
                return false
            }
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing5(brackets: "(") == false
// correctBracketing5(brackets: "()") == true
// correctBracketing5(brackets: "(()())") == true
// correctBracketing5(brackets: ")(()") == false
func correctBracketing5(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing6(brackets: "(") == false
// correctBracketing6(brackets: "()") == true
// correctBracketing6(brackets: "(()())") == true
// correctBracketing6(brackets: ")(()") == false
func correctBracketing6(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing7(brackets: "(") == false
// correctBracketing7(brackets: "()") == true
// correct
if stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?
if stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.removeLast()!= "(" { // cannot force unwrap value of non-optional type 'Character'
if stack.removeLast()!= "(" { // '=' must have consistent whitespace on both sides
if stack.removeLast()!= "(" { // use of '=' in a boolean context, did you mean '=='?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

func correctedBrackets(brackets: String) -> String {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return ""
            }
            stack.removeLast()
        }
    }
    return String(stack.reversed())
}

func openingBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    var openingBrackets = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
        }
    }
    return stack
}

func closingBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    var closingBrackets = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
            closingBrackets.append(index)
        }
    }
    return closingBrackets
}

func openingAndClosingBrackets(brackets: String) -> [[Int]] {
    var stack = [[Int]]()
    var openingAndClosingBrackets = [[Int]]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append([index, index])
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
            openingAndClosingBrackets.append([stack.last![0], index])
        }
    }
    return openingAndClosingBrackets
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.count == 0
}

// brackets is a string of "(" and ")".
// return a string with each open bracket replaced with a closing bracket.
// if no closing bracket can be found, return an empty string.
// correctedBrackets(brackets: "(") == ")"
// correctedBrackets(brackets: "()") == ")"
// correctedBrackets(brackets: "(()())") == ")))"
// correctedBrackets(brackets: ")(()") == ""
func correctedBrackets(brackets: String) -> String {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.count == 0 {
                return ""
            }
            stack.removeLast()
        }
    }
    return String(stack.reversed())
}

// brackets is a string of "(" and ")".
// return an array of the indexes of the opening brackets.
// openingBrackets(brackets: "(") == [0]
// openingBrackets(brackets: "()") == [0, 1]
// openingBrackets(brackets: "(()())") == [0, 1, 3, 5]
// openingBrackets(brackets: ")(()") == [1, 3]
func openingBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    var openingBrackets = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
        }
    }
    return stack
}

// brackets is a string of "(" and ")".
// return an array of the indexes of the closing brackets.
// closingBrackets(brackets: "(") == []
// closingBrackets(brackets: "()") == [1]
// closingBrackets(brackets: "(()())") == [7, 5]
// closingBrackets(brackets: ")(()") == [3, 1]
func closingBrackets(brackets: String) -> [Int] {
    var stack = [Int]()
    var closingBrackets = [Int]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append(index)
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
            closingBrackets.append(index)
        }
    }
    return closingBrackets
}

// brackets is a string of "(" and ")".
// return an array of the indexes of the opening and closing brackets.
// openingAndClosingBrackets(brackets: "(") == [[0, 0]]
// openingAndClosingBrackets(brackets: "()") == [[0, 0], [1, 1]]
// openingAndClosingBrackets(brackets: "(()())") == [[0, 0], [1, 1], [3, 3], [5, 5]]
// openingAndClosingBrackets(brackets: ")(()") == [[1, 1], [3, 3]]
func openingAndClosingBrackets(brackets: String) -> [[Int]] {
    var stack = [[Int]]()
    var openingAndClosingBrackets = [[Int]]()
    for (index, bracket) in brackets.enumerated() {
        if bracket == "(" {
            stack.append([index, index])
        } else if bracket == ")" {
            if stack.count == 0 {
                return []
            }
            stack.removeLast()
            openingAndClosingBrackets.append([stack.last![0], index])
        }
    }
    return openingAndClosingBrackets
}

// brackets is a string of "(" and ")".
// return an array of the indexes of the opening and closing brackets.
// openingAndClosingBrackets(brackets: "(") == [[
var openingBrackets = [Int]() // initialization of variable 'openingBrackets' was never used; consider replacing with assignment to '_' or removing it
Problem #79 Experiment #166 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" &&!stack.isEmpty {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" &&!stack.isEmpty {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
} else if character == ")" &&!stack.isEmpty { // expected '{' after 'if' condition

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

func correctBracketing(brackets: String) -> Bool {
    var open = 0
    for character in brackets {
        if character == "(" {
            open += 1
        } else {
            if open == 0 {
                return false
            }
            open -= 1
        }
    }
    return open == 0
}

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
### Notes:
* The time complexity is because we are iterating through the input string and checking each character.
* The space complexity is because we are using a stack data structure to keep track of the opening brackets.
* We can optimize the solution by using a single pass through the string and keeping track of the number of open and closed brackets. This would reduce the space complexity to O(1).
```swift
func correctBracketing(brackets: String) -> Bool {
    var open = 0
    for character in brackets {
        if character == "(" {
            open += 1
        } else {
            if open == 0 {
                return false
            }
            open -= 1
        }
    }
    return open == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character in brackets {
        if character == "(" {
            count += 1
        } else {
            if count == 0 {
                return false
            }
            count -= 1
        }
    }
    return count == 0
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(1)
### Notes:
* The time complexity is the same as the previous solution.
* The space complexity is reduced to O(1) because we are not using any additional data structures.
```swift
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for character
func correctBracketing(brackets: String) -> Bool { // invalid redeclaration of 'correctBracketing(brackets:)'
func correctBracketing(brackets: String) -> Bool { // invalid redeclaration of 'correctBracketing(brackets:)'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" &&!stack.isEmpty {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else if character == ")" &&!stack.isEmpty {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
} else if character == ")" &&!stack.isEmpty { // expected '{' after 'if' condition

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Explanation:
This function takes a string of brackets as an input and returns a boolean value indicating whether the brackets are correctly bracketed.

The function first initializes an empty array `stack` to store the opening brackets. It then iterates through each character in the input string `brackets`.

If the current character is an opening bracket, it is added to the `stack`. If the current character is a closing bracket, the function checks if the `stack` is empty. If it is not empty, the last element in the `stack` is removed. If the `stack` is empty, the function returns `false`.

If the loop completes and the `stack` is empty, it means that all the opening brackets have been matched with a closing bracket, and the function returns `true`.

If the loop completes and the `stack` is not empty, it means that there are more opening brackets than closing brackets, and the function returns `false`.

### Time complexity:
The time complexity of this function is O(n), where n is the length of the input string `brackets`.

### Space complexity:
The space complexity of this function is O(n), where n is the length of the input string `brackets`.

### Test case:
```swift
print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```
### Output:
```
false
true
true
false
```
### Conclusion:
This function correctly determines whether a string of brackets is correctly bracketed. It uses a stack data structure to keep track of the opening brackets, and checks if the number of opening brackets is equal to the number of closing brackets. If the number of opening brackets is greater than the number of closing brackets, the function returns `false`. Otherwise, it returns `true`.

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
### Notes:
This solution uses a stack data structure to keep track of the opening brackets. The time complexity is O(n) because we iterate through the string once, and the space complexity is O(n) because we keep track of all the opening brackets in the stack.

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
### Notes:
This solution uses a stack data structure to keep track of the opening brackets. The time complexity is O(n) because we iterate through the input string once, and the space complexity is O(n) because we keep track of all the opening brackets in the stack.

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for character in brackets {
        if character == "(" {
            stack.append(character)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```
### Time Complexity:
O(n)
### Space Complexity:
O(n)
Problem #79 Experiment #203 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------

// ------------------------------------
stack.pop() // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

func repeatedLetters(text: String) -> String {
    var words = text.split(separator: " ")
    var repeatedLetters = [String]()
    var repeatedLettersCount = [Int]()
    for word in words {
        var repeatedLettersCountForWord = 0
        var repeatedLettersForWord = [Character]()
        for letter in word {
            if repeatedLettersForWord.contains(letter) {
                repeatedLettersCountForWord += 1
            } else {
                repeatedLettersForWord.append(letter)
            }
        }
        repeatedLetters.append(word)
        repeatedLettersCount.append(repeatedLettersCountForWord)
    }
    var maxRepeatedLettersCount = repeatedLettersCount[0]
    var indexOfMaxRepeatedLettersCount = 0
    for i in 1..<repeatedLettersCount.count {
        if repeatedLettersCount[i] > maxRepeatedLettersCount {
            maxRepeatedLettersCount = repeatedLettersCount[i]
            indexOfMaxRepeatedLettersCount = i
        }
    }
    return repeatedLetters[indexOfMaxRepeatedLettersCount]
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// 2.
// Given a string of text, return the first word with the greatest number of repeated letters.
// If there are multiple words that have the greatest number of repeated letters, return the first one.
// repeatedLetters("hello world") == "hello"
// repeatedLetters("a a a a b b b b") == "b"
// repeatedLetters("a a a a b b b b c c c c") == "c"
func repeatedLetters(text: String) -> String {
    var words = text.split(separator: " ")
    var repeatedLetters = [String]()
    var repeatedLettersCount = [Int]()
    for word in words {
        var repeatedLettersCountForWord = 0
        var repeatedLettersForWord = [Character]()
        for letter in word {
            if repeatedLettersForWord.contains(letter) {
                repeatedLettersCountForWord += 1
            } else {
                repeatedLettersForWord.append(letter)
            }
        }
        repeatedLetters.append(word)
        repeatedLettersCount.append(repeatedLettersCountForWord)
    }
    var maxRepeatedLettersCount = repeatedLettersCount[0]
    var indexOfMaxRepeatedLettersCount = 0
    for i in 1..<repeatedLettersCount.count {
        if repeatedLettersCount[i] > maxRepeatedLettersCount {
            maxRepeatedLettersCount = repeatedLettersCount[i]
            indexOfMaxRepeatedLettersCount = i
        }
    }
    return repeatedLetters[indexOfMaxRepeatedLettersCount]
}

// 3.
// Given a string of text, return the first word with the greatest number of repeated letters.
// If there are multiple words that have the greatest number of repeated letters, return the first one.
// repeatedLetters("hello world") == "hello"
// repeatedLetters("a a a a b b b b") == "b"
// repeatedLetters("a a a a b b b b c c c c") == "c"
func repeatedLetters(text: String) -> String {
    var words = text.split(separator: " ")
    var repeatedLetters = [String]()
    var repeatedLettersCount = [Int]()
    for word in words {
        var repeatedLettersCountForWord = 0
        var repeatedLettersForWord = [Character]()
        for letter in word {
            if repeatedLettersForWord.contains(letter) {
                repeatedLettersCountForWord += 1
            } else {
                repeatedLettersForWord.append(letter)
            }
        }
        repeatedLetters.append(word)
        repeatedLettersCount.append(repeatedLettersCountForWord)
    }
    var maxRepeatedLettersCount = repeatedLettersCount[0]
    var indexOfMaxRepeatedLettersCount = 0
    for i in 1..<repeatedLettersCount.count {
        if repeatedLettersCount[i] > maxRepeatedLettersCount {
            maxRepeatedLettersCount = repeatedLettersCount[i]
            indexOfMaxRepeatedLettersCount = i
        }
    }
    return repeatedLetters[indexOfMaxRepeatedLettersCount]
}

// 4.
// Given a string of text, return the first word with the greatest number of repeated letters.
// If there are multiple words that have the greatest number of repeated letters, return the first one.
// repeatedLetters("hello world") == "hello"
// repeatedLetters("a a a a b b b b") == "b"
// repeatedLetters("a a a a b b b b c c c c") == "c"
func repeatedLetters(text: String) -> String {
    var words = text.split(separator: " ")
    var repeatedLetters = [String]()
    var repeatedLettersCount = [Int]()
    
stack.pop() // value of type '[Character]' has no member 'pop'
repeatedLetters.append(word) // cannot convert value of type 'String.SubSequence' (aka 'Substring') to expected argument type 'String'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty()
}

func reverseString(s: String) -> String {
    var reversed = ""
    for char in s {
        reversed = char + reversed
    }
    return reversed
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty()
}

// -----------------------------------------------------------------------------
// 1.1.3
// -----------------------------------------------------------------------------
// Write a function that takes a string as input and returns the string reversed.
// reverseString("hello") == "olleh"
// reverseString("") == ""
// reverseString("h") == "h"
// reverseString("a") == "a"
// reverseString("ab") == "ba"
// reverseString("abc") == "cba"
// reverseString("abcd") == "dcba"
// reverseString("abcde") == "edcba"
func reverseString(s: String) -> String {
    var reversed = ""
    for char in s {
        reversed = char + reversed
    }
    return reversed
}

// -----------------------------------------------------------------------------
// 1.1.4
// -----------------------------------------------------------------------------
// Write a function that takes a string as input and returns the string with
// all capital letters converted to lowercase letters, and vice versa.
// swapCase("Hello, World!") == "hELLO, wORLD!"
// swapCase("HELLO, WORLD!") == "hello, world!"
// swapCase("") == ""
// swapCase("a") == "A"
// swapCase("A") == "a"
// swapCase("aBc") == "AbC"
// swapCase("AbC") == "aBC"
// swapCase("AbCd") == "aBCd"
// swapCase("AbCdEf") == "aBCdEf"
// swapCase("AbCdEfGh") == "aBCdEfgh"
// swapCase("AbCdEfGhIj") == "aBCdEfghIJ"
// swapCase("AbCdEfGhIjKl") == "aBCdEfghIJKL"
// swapCase("AbCdEfGhIjKlMn") == "aBCdEfghIJKLmN"
// swapCase("AbCdEfGhIjKlMnNoPqRsTuVwXyZ") == "aBCdEfghIJKLmNnOPQRSTUVWXYZ"
// swapCase("AbCdEfGhIjKlMnNoPqRsTuVwXyZ!@#$%^&*()") == "aBCdEfghIJKLmNnOPQRSTUVWXYZ!@#$%^&*()"
// swapCase("AbCdEfGhIjKlMnNoPqRsTuVwXyZ!@#$%^&*()-=_+") == "aBCdEfghIJKLmNnOPQRSTUVWXYZ!@#$%^&*()-=_+"
// swapCase("AbCdEfGhIjKlMnNoPqRsTuVwXyZ!@#$%^&*()-=_+{|}") == "aBCdEfghIJKLmNnOPQRSTUVWXYZ!@#$%^&*()-=_+{|}"
// swapCase("AbCdEfGhIjKlMnNoPqRsTuVwXyZ!@#$%^&*()-=_+{|}~") == "aBCdEfghIJKLmNnOPQRSTUVWXYZ!@#$%^&*()-=_+{|}~"
// swapCase("AbCdEfGhIjKlMnNo
if stack.isEmpty() { // cannot call value of non-function type 'Bool'
stack.pop() // value of type '[Character]' has no member 'pop'
return stack.isEmpty() // cannot call value of non-function type 'Bool'
reversed = char + reversed // cannot convert value of type 'Character' to expected argument type 'String'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

func countVowels(string: String) -> Int {
    var count = 0
    for char in string {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

func countSubstring(string: String, substring: String) -> Int {
    var count = 0
    var index = 0
    while index < string.count {
        index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive)
        if index != nil {
            count += 1
            index += substring.count
        } else {
            break
        }
    }
    return count
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// -----------------------------------------------------------------------------
// 2. Write a function that takes a string as input and returns the number of
// vowels in the string.
// countVowels("Hello world") == 3
// countVowels("aeiou") == 5
// countVowels("") == 0
func countVowels(string: String) -> Int {
    var count = 0
    for char in string {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

// -----------------------------------------------------------------------------
// 3. Write a function that takes a string as input and returns the number of
// times the string appears in the string.
// countSubstring("Hello world", "llo") == 2
// countSubstring("Hello world", "lo") == 2
// countSubstring("Hello world", "world") == 1
// countSubstring("Hello world", "") == 1
func countSubstring(string: String, substring: String) -> Int {
    var count = 0
    var index = 0
    while index < string.count {
        index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive)
        if index != nil {
            count += 1
            index += substring.count
        } else {
            break
        }
    }
    return count
}

// -----------------------------------------------------------------------------
// 4. Write a function that takes a string as input and returns the number of
// times the string appears in the string.
// countSubstring("Hello world", "llo") == 2
// countSubstring("Hello world", "lo") == 2
// countSubstring("Hello world", "world") == 1
// countSubstring("Hello world", "") == 1
func countSubstring(string: String, substring: String) -> Int {
    var count = 0
    var index = 0
    while index < string.count {
        index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive)
        if index != nil {
            count += 1
            index += substring.count
        } else {
            break
        }
    }
    return count
}

// -----------------------------------------------------------------------------
// 5. Write a function that takes a string as input and returns the number of
// times the string appears in the string.
// countSubstring("Hello world", "llo") == 2
// countSubstring("Hello world", "lo") == 2
// countSubstring("Hello world", "world") == 1
// countSubstring("Hello world", "") == 1
func countSubstring(string: String, substring: String) -> Int {
    var count = 0
    var index = 0
    while index < string.count {
        index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive)
        if index != nil {
            count += 1
            index += substring.count
        } else {
            break
        }
    }
    return count
}

// ---------------------------------------------------------
stack.pop() // value of type '[Character]' has no member 'pop'
index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive) // cannot assign value of type 'String.Index?' to type 'Int'
index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive) // extra arguments at positions #2, #3 in call
index = string.index(of: substring, range: (index, string.count - index), options: .caseInsensitive) // cannot infer contextual base in reference to member 'caseInsensitive'
if index != nil { // comparing non-optional value of type 'Int' to 'nil' always returns true

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// 2. Write a function that takes a string of brackets and determines if the brackets are balanced.
// The function should return true if the brackets are balanced and false if they are not.
// The brackets are balanced if for every opening bracket, there is a closing bracket.
// The brackets must be closed in the correct order.
// The brackets must also be matched with the correct order.
// The function should return false if the brackets are not balanced.
// balancedBrackets(brackets: "()") == true
// balancedBrackets(brackets: ")(()") == false
// balancedBrackets(brackets: "(()())") == true
// balancedBrackets(brackets: "(()))") == false
// balancedBrackets(brackets: "(()))(") == false
// balancedBrackets(brackets: "(()))((") == false
// balancedBrackets(brackets: "(()))((()") == false
// balancedBrackets(brackets: "(()))((())") == true
// balancedBrackets(brackets: "(()))((())(") == false
// balancedBrackets(brackets: "(()))((())(()") == false
// balancedBrackets(brackets: "(()))((())(())") == true
// balancedBrackets(brackets: "(()))((())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())") == true
// balancedBrackets(brackets: "(()))((())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())") == true
// balancedBrackets(brackets: "(()))((())(())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())") == true
// balancedBrackets(brackets: "(()))((())(())(())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())") == true
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())") == true
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(())(") == false
// balancedBrackets(brackets: "(()))((())(())(())(())(())(())(())(())(()") == false
// balancedBrackets(brackets: "(()))((())(()
stack.pop() // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

func vowelsInString(string: String) -> Int {
    var vowels = 0
    for char in string {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            vowels += 1
        }
    }
    return vowels
}

func wordsInString(string: String) -> Int {
    var words = 0
    var currentWord = ""
    for char in string {
        if char == " " {
            words += 1
            currentWord = ""
        } else {
            currentWord += char
        }
    }
    if currentWord != "" {
        words += 1
    }
    return words
}

func consonantsInString(string: String) -> Int {
    var consonants = 0
    for char in string {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            consonants += 1
        }
    }
    return consonants
}

func uppercaseInString(string: String) -> Int {
    var uppercase = 0
    for char in string {
        if char == char.uppercase {
            uppercase += 1
        }
    }
    return uppercase
}

func lowercaseInString(string: String) -> Int {
    var lowercase = 0
    for char in string {
        if char == char.lowercase {
            lowercase += 1
        }
    }
    return lowercase
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// -----------------------------------------------------------------------------
// 12. Write a function that takes a string and returns the number of vowels in the string.
// vowelsInString("Hello world") == 3
// vowelsInString("aeiou") == 5
// vowelsInString("") == 0
func vowelsInString(string: String) -> Int {
    var vowels = 0
    for char in string {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            vowels += 1
        }
    }
    return vowels
}

// -----------------------------------------------------------------------------
// 13. Write a function that takes a string and returns the number of words in the string.
// wordsInString("Hello world") == 2
// wordsInString("") == 0
// wordsInString("Hello world, how are you?") == 4
func wordsInString(string: String) -> Int {
    var words = 0
    var currentWord = ""
    for char in string {
        if char == " " {
            words += 1
            currentWord = ""
        } else {
            currentWord += char
        }
    }
    if currentWord != "" {
        words += 1
    }
    return words
}

// -----------------------------------------------------------------------------
// 14. Write a function that takes a string and returns the number of consonants in the string.
// consonantsInString("Hello world") == 5
// consonantsInString("aeiou") == 0
// consonantsInString("") == 0
func consonantsInString(string: String) -> Int {
    var consonants = 0
    for char in string {
        if char != "a" && char != "e" && char != "i" && char != "o" && char != "u" {
            consonants += 1
        }
    }
    return consonants
}

// -----------------------------------------------------------------------------
// 15. Write a function that takes a string and returns the number of uppercase letters in the string.
// uppercaseInString("Hello world") == 1
// uppercaseInString("") == 0
// uppercaseInString("Hello world, how are you?") == 2
func uppercaseInString(string: String) -> Int {
    var uppercase = 0
    for char in string {
        if char == char.uppercase {
            uppercase += 1
        }
    }
    return uppercase
}

// -----------------------------------------------------------------------------
// 16. Write a function that takes a string and returns the number of lowercase letters in the string.
// lowercaseInString("Hello world") == 5
// lowercaseInString("") == 0
// lowercaseInString("Hello world, how are you?") == 11
func lowercaseInString(string: String) -> Int {
    var lowercase = 0
    for char in string {
        if char == char.lowercase {
            lowercase += 1
        }
    }
    return lowercase
}

// ---------------------------------------------------------------------------
stack.pop() // value of type '[Character]' has no member 'pop'
currentWord += char // cannot convert value of type 'Character' to expected argument type 'String'
if char == char.uppercase { // value of type 'Character' has no member 'uppercase'
if char == char.lowercase { // value of type 'Character' has no member 'lowercase'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.pop()
        default:
            break
        }
    }
    return stack.isEmpty
}

func reverseString(s: String) -> String {
    return String(s.reversed())
}

func isIsomorphic(s: String, t: String) -> Bool {
    return isIsomorphicHelper(s, t) && isIsomorphicHelper(t, s)
}

func isIsomorphicHelper(s: String, t: String) -> Bool {
    var map = [Character: Character]()
    for i in 0..<s.count {
        if map[s[i]] == nil {
            map[s[i]] = t[i]
        } else if map[s[i]] != t[i] {
            return false
        }
    }
    return true
}

func isPalindrome(s: String) -> Bool {
    var s = s.trim().toLowerCase()
    var i = 0
    var j = s.count - 1
    while i < j {
        if !isAlphaNumeric(s[i]) {
            i++
        } else if !isAlphaNumeric(s[j]) {
            j--
        } else if s[i] != s[j] {
            return false
        } else {
            i++
            j--
        }
    }
    return true
}

func isAlphaNumeric(c: Character) -> Bool {
    return (c >= "a" && c <= "z") || (c >= "0" && c <= "9")
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        switch bracket {
        case "(":
            stack.append(bracket)
        case ")":
            if stack.isEmpty {
                return false
            }
            stack.pop()
        default:
            break
        }
    }
    return stack.isEmpty
}

// -----------------------------------------------------------------------------
// 1.1
// -----------------------------------------------------------------------------
// Write a function that takes a string as input and returns the string reversed.
// Example:
// Given s = "hello", return "olleh".
func reverseString(s: String) -> String {
    return String(s.reversed())
}

// -----------------------------------------------------------------------------
// 1.2
// -----------------------------------------------------------------------------
// Given two strings s and t, determine if they are isomorphic.
// Two strings are isomorphic if the characters in s can be replaced to get t.
// All occurrences of a character must be replaced with another character while
// preserving the order of characters. No two characters may map to the same
// character but a character may map to itself.
// Example 1:
// Input: s = "egg", t = "add"
// Output: true
// Example 2:
// Input: s = "foo", t = "bar"
// Output: false
// Example 3:
// Input: s = "paper", t = "title"
// Output: true
// Note:
// You may assume both s and t have the same length.
func isIsomorphic(s: String, t: String) -> Bool {
    return isIsomorphicHelper(s, t) && isIsomorphicHelper(t, s)
}

func isIsomorphicHelper(s: String, t: String) -> Bool {
    var map = [Character: Character]()
    for i in 0..<s.count {
        if map[s[i]] == nil {
            map[s[i]] = t[i]
        } else if map[s[i]] != t[i] {
            return false
        }
    }
    return true
}

// -----------------------------------------------------------------------------
// 1.3
// -----------------------------------------------------------------------------
// Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
// Note: For the purpose of this problem, we define empty string as valid palindrome.
// Example 1:
// Input: "A man, a plan, a canal: Panama"
// Output: true
// Example 2:
// Input: "race a car"
// Output: false
func isPalindrome(s: String) -> Bool {
    var s = s.trim().toLowerCase()
    var i = 0
    var j = s.count - 1
    while i < j {
        if !isAlphaNumeric(s[i]) {
            i++
        } else if !isAlphaNumeric(s[j]) {
            j--
        } else if s[i] != s[j] {
            return false
        } else {
            i++
            j--
        }
    }
    return true
}

func isAlphaNumeric(c: Character) -> Bool {
    return (c >= "a" && c <= "z") || (c >= "0" && c <= "9")
}

// -----------------------------------------------------------------------------
// 1.4
// -----------------------------------------------------------------------------
// Given an input string, reverse the string word by word.
// A word is defined as a sequence of
stack.pop() // value of type '[Character]' has no member 'pop'
return isIsomorphicHelper(s, t) && isIsomorphicHelper(t, s) // missing argument labels 's:t:' in call
return isIsomorphicHelper(s, t) && isIsomorphicHelper(t, s) // missing argument labels 's:t:' in call
if map[s[i]] == nil { // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
map[s[i]] = t[i] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
map[s[i]] = t[i] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
} else if map[s[i]] != t[i] { // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
} else if map[s[i]] != t[i] { // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
var s = s.trim().toLowerCase() // value of type 'String' has no member 'trim'
if !isAlphaNumeric(s[i]) { // missing argument label 'c:' in call
i++ // cannot find operator '++' in scope; did you mean '+= 1'?
} else if !isAlphaNumeric(s[j]) { // missing argument label 'c:' in call
j-- // cannot find operator '--' in scope; did you mean '-= 1'?
i++ // cannot find operator '++' in scope; did you mean '+= 1'?
j-- // cannot find operator '--' in scope; did you mean '-= 1'?

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty
}

// -----------------------------------------------------------------------------
// 1.2
// -----------------------------------------------------------------------------
// Write a function that takes a string as input and returns the string reversed.
// reverseString("hello") == "olleh"
// reverseString("") == ""
// reverseString("h") == "h"
// reverseString("a") == "a"
// reverseString("a b") == "b a"
// reverseString("a b c") == "c b a"
// reverseString("a b c d") == "d c b a"
// reverseString("a b c d e") == "e d c b a"
// reverseString("a b c d e f") == "f e d c b a"
// reverseString("a b c d e f g") == "g f e d c b a"
// reverseString("a b c d e f g h") == "h g f e d c b a"
// reverseString("a b c d e f g h i") == "i h g f e d c b a"
// reverseString("a b c d e f g h i j") == "j i h g f e d c b a"
// reverseString("a b c d e f g h i j k") == "k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l") == "l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m") == "m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n") == "n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o") == "o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p") == "p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q") == "q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r") == "r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r s") == "s r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r s t") == "t s r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r s t u") == "u t s r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r s t u v") == "v w u t s r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n o p q r s t u v w") == "w x v t s r q p o n m l k j i h g f e d c b a"
// reverseString("a b c d e f g h i j k l m n
stack.pop() // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty()
}

func countVowels(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

func countWords(input: String) -> Int {
    var count = 0
    for char in input {
        if char == " " {
            count += 1
        }
    }
    return count + 1
}

func countSentences(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "." {
            count += 1
        }
    }
    return count
}

func countParagraphs(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "\n" {
            count += 1
        }
    }
    return count
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            } else {
                stack.pop()
            }
        }
    }
    return stack.isEmpty()
}

// 1.1.2
// Write a function that takes a string as input and returns the number of vowels in the string.
// countVowels("Hello world") == 3
// countVowels("I love cats") == 4
// countVowels("I love dogs") == 3
// countVowels("I love birds") == 4
// countVowels("I love birds and cats") == 8
func countVowels(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

// 1.1.3
// Write a function that takes a string as input and returns the number of words in the string.
// countWords("Hello world") == 2
// countWords("I love cats") == 2
// countWords("I love dogs") == 2
// countWords("I love birds") == 2
// countWords("I love birds and cats") == 4
func countWords(input: String) -> Int {
    var count = 0
    for char in input {
        if char == " " {
            count += 1
        }
    }
    return count + 1
}

// 1.1.4
// Write a function that takes a string as input and returns the number of sentences in the string.
// countSentences("Hello world. I love cats.") == 2
// countSentences("I love dogs. I love cats.") == 2
// countSentences("I love birds. I love cats.") == 2
// countSentences("I love birds and cats.") == 1
// countSentences("I love birds and cats. I love cats.") == 2
func countSentences(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "." {
            count += 1
        }
    }
    return count
}

// 1.1.5
// Write a function that takes a string as input and returns the number of paragraphs in the string.
// countParagraphs("Hello world. I love cats.") == 1
// countParagraphs("I love dogs. I love cats.") == 1
// countParagraphs("I love birds. I love cats.") == 1
// countParagraphs("I love birds and cats.") == 1
// countParagraphs("I love birds and cats. I love cats.") == 2
func countParagraphs(input: String) -> Int {
    var count = 0
    for char in input {
        if char == "\n" {
            count += 1
        }
    }
    return count
}

// 1.1.6
// Write a function that takes a string as input and returns the number of words in the string.
// countWords("Hello world. I love cats.") == 2
// countWords("I love dogs. I love cats.") == 2
// countWords("I love birds. I love cats.") == 2
// countWords("I love birds and cats.") == 2
// countWords("I love birds and cats. I love cats.") == 2
func countWords(input: String) -> Int {
    var count = 0
    for char in input {
        if char == " " {
            count += 1
        }
    }
    return count + 1
}

// 1.1.7
// Write a function that takes a string as input and returns the number of words in the string.
// countWords("Hello world. I love
if stack.isEmpty() { // cannot call value of non-function type 'Bool'
stack.pop() // value of type '[Character]' has no member 'pop'
return stack.isEmpty() // cannot call value of non-function type 'Bool'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty()
}

func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount == notCount
}

func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount > notCount
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty() {
                return false
            }
            stack.pop()
        }
    }
    return stack.isEmpty()
}

// 1.1.2
// Given a string, return true if the number of appearances of "is" anywhere in the
// string is equal to the number of appearances of "not" anywhere in the string (case sensitive).
// isNotIsNot("not not is not") == true
// isNotIsNot("is is not not") == false
// isNotIsNot("is is not is not") == false
func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount == notCount
}

// 1.1.3
// Given a string, return true if the number of appearances of "is" anywhere in the
// string is greater than the number of appearances of "not" anywhere in the string (case sensitive).
// isNotIsNot("not not is not") == true
// isNotIsNot("is is not not") == false
// isNotIsNot("is is not is not") == true
func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount > notCount
}

// 1.1.4
// Given a string, return true if the number of appearances of "is" anywhere in the
// string is greater than the number of appearances of "not" anywhere in the string (case sensitive).
// isNotIsNot("not not is not") == true
// isNotIsNot("is is not not") == false
// isNotIsNot("is is not is not") == true
func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount > notCount
}

// 1.1.5
// Given a string, return true if the number of appearances of "is" anywhere in the
// string is greater than the number of appearances of "not" anywhere in the string (case sensitive).
// isNotIsNot("not not is not") == true
// isNotIsNot("is is not not") == false
// isNotIsNot("is is not is not") == true
func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount > notCount
}

// 1.1.6
// Given a string, return true if the number of appearances of "is" anywhere in the
// string is greater than the number of appearances of "not" anywhere in the string (case sensitive).
// isNotIsNot("not not is not") == true
// isNotIsNot("is is not not") == false
// isNotIsNot("is is not is not") == true
func isNotIsNot(input: String) -> Bool {
    var isCount = 0
    var notCount = 0
    for char in input {
        if char == "is" {
            isCount += 1
        } else if char == "not" {
            notCount += 1
        }
    }
    return isCount > notCount
}
if stack.isEmpty() { // cannot call value of non-function type 'Bool'
stack.pop() // value of type '[Character]' has no member 'pop'
return stack.isEmpty() // cannot call value of non-function type 'Bool'
if char == "is" { // binary operator '==' cannot be applied to operands of type 'Character' and 'String'
} else if char == "not" { // binary operator '==' cannot be applied to operands of type 'Character' and 'String'
func isNotIsNot(input: String) -> Bool { // invalid redeclaration of 'isNotIsNot(input:)'
if char == "is" { // binary operator '==' cannot be applied to operands of type 'Character' and 'String'
} else if char == "not" { // binary operator '==' cannot be applied to operands of type 'Character' and 'String'
Problem #79 Experiment #204 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(") == false)
print(correctBracketing(brackets: "()") == true)
print(correctBracketing(brackets: "(()())") == true)
print(correctBracketing(brackets: ")(()") == false)
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(") == false)
print(correctBracketing(brackets: "()") == true)
print(correctBracketing(brackets: "(()())") == true)
print(correctBracketing(brackets: ")(()") == false)
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.removeLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(") == false)
print(correctBracketing(brackets: "()") == true)
print(correctBracketing(brackets: "(()())") == true)
print(correctBracketing(brackets: ")(()") == false)
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if !stack.isEmpty && stack.last! == "(" {
            stack.popLast()
        } else {
            return false
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(") == false)
print(correctBracketing(brackets: "()") == true)
print(correctBracketing(brackets: "(()())") == true)
print(correctBracketing(brackets: ")(()") == false)
```
stack.popLast() // result of call to 'popLast()' is unused

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}

print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```
Problem #79 Experiment #206 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.pop() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```
if stack.isEmpty || stack.pop() != "(" { // value of type '[Character]' has no member 'pop'
Problem #79 Experiment #207 

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for char in brackets {
        if char == "(" {
            count += 1
        } else if char == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```
Problem #79 Experiment #208 

func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for char in brackets {
        if char == "(" {
            openBrackets += 1
        } else if char == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}

// test cases
assert(correctBracketing(brackets: "(") == false)
assert(correctBracketing(brackets: "()") == true)
assert(correctBracketing(brackets: "(()())") == true)
assert(correctBracketing(brackets: ")(()") == false)
```



func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty || stack.removeLast() != "(" {
                return false
            }
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var count = 0
    for bracket in brackets {
        if bracket == "(" {
            count += 1
        } else if bracket == ")" {
            count -= 1
        }
        if count < 0 {
            return false
        }
    }
    return count == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```



func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for bracket in brackets {
        if bracket == "(" {
            stack.append(bracket)
        } else if bracket == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    return stack.isEmpty
}
```



func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}
```swift
// brackets is a string of "(" and ")".
// return true if every opening bracket has a corresponding closing bracket.
// correctBracketing(brackets: "(") == false
// correctBracketing(brackets: "()") == true
// correctBracketing(brackets: "(()())") == true
// correctBracketing(brackets: ")(()") == false
func correctBracketing(brackets: String) -> Bool {
    var openBrackets = 0
    for bracket in brackets {
        if bracket == "(" {
            openBrackets += 1
        } else if bracket == ")" {
            openBrackets -= 1
            if openBrackets < 0 {
                return false
            }
        }
    }
    return openBrackets == 0
}

// Test cases
print(correctBracketing(brackets: "(")) // false
print(correctBracketing(brackets: "()")) // true
print(correctBracketing(brackets: "(()())")) // true
print(correctBracketing(brackets: ")(()")) // false
```
Problem #79 Experiment #209 

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched
    return balance == 0
}
```



func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched
    return balance == 0
}
```



func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```



func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without an opening one
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
        }
        
        // If balance goes negative, there's a closing bracket without an opening one
        if balance < 0 {
            return false
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets are correctly matched
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets are correctly matched
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var balance = 0
    
    for char in brackets {
        if char == "(" {
            balance += 1
        } else if char == ")" {
            balance -= 1
            
            // If balance goes negative, there's a closing bracket without an opening one
            if balance < 0 {
                return false
            }
        }
    }
    
    // If balance is zero, all brackets have been matched correctly
    return balance == 0
}
```
Problem #79 Experiment #210 

func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var counter = 0
    
    for char in brackets {
        if char == "(" {
            counter += 1
        } else if char == ")" {
            counter -= 1
        }
        
        if counter < 0 {
            return false
        }
    }
    
    return counter == 0
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
system
You are Qwen, created by Alibaba Cloud. You are a helpful assistant.
user
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
assistant
```swift
func correctBracketing(brackets: String) -> Bool { 
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            }
            stack.removeLast()
        }
    }
    
    return stack.isEmpty
}
```
Problem #79 Experiment #211 

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    
    return stack.isEmpty
}
```

func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
brackets is a string of "(" and ")".
return true if every opening bracket has a corresponding closing bracket.
correctBracketing(brackets: "(") == false
correctBracketing(brackets: "()") == true
correctBracketing(brackets: "(()())") == true
correctBracketing(brackets: ")(()") == false
### Response:
```swift
func correctBracketing(brackets: String) -> Bool {
    var stack = [Character]()
    for char in brackets {
        if char == "(" {
            stack.append(char)
        } else if char == ")" {
            if stack.isEmpty {
                return false
            } else {
                stack.removeLast()
            }
        }
    }
    return stack.isEmpty
}
```